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Though I just looked and maybe it is the humbucking circuit that causes the drain? It comes off the 2nd triode's grid and is connected to B+ and ground via resistors. That will do it won't it as it is basically 2 resistors to ground.

While I am enjoying this preamp I have found that it is actually too critical with mp3 type material. Seeing as how it has a small form factor and is cheap to build I think its main role would be office and secondary system use.

Is there a good way to actually decrease this? Basically it really brings out the sound of compression. I am thinking a cap that is a little hazy on its own (like a Solen) might do the trick.

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